Ah but you can. Add your directory as usual, so that c:\directory\stuff\*.* is in the Include list. Right click on the folder name you've added and select Manual Edit. Edit the extension to c:\directory\stuff\*.xml and save. Go to Cleaner and right click on Custom Files and Folders, and select Analyse. See what's listed, and if it's what you want.
Ah but you can. Add your directory as usual, so that c:\directory\stuff\*.* is in the Include list. Right click on the folder name you've added and select Manual Edit. Edit the extension to c:\directory\stuff\*.xml and save. Go to Cleaner and right click on Custom Files and Folders, and select Analyse. See what's listed, and if it's what you want.
Test this first. I give no guarantees.
Thank you, thank you, thank you SIR!!! Never knew this "manual edit" existed. Been using CCleaner for quite a while. This is GREAT!